摘要
在多孔介质的连续介质模型基础上建立了宏观偏析模拟计算的诸方程,采用尝试法计算解决了各个方程中由于未知变量相互制约而引起的非线性问题,结果表明,Al-Cu合金铸锭在低速冷却条件下,存在由自然对流引起的径向回流分量;最终成分分布的计算值与实验值吻合较好,确认了偏析模拟计算的价值。
The equations for numerical simulation of channel segregation basedon a model of continuum approach to porous medium were advanced. In order tosolve non-linear computation problems caused by the interaction with each other ofunknown variables in the equations, the trial-and-error method is used. The com-putation results showed that radial back-flow due to natual convection in mushyzone indeed exists in the Al-4.5wt-%Cu alloy ingot under the condition of lowcooling rate, and the numerical simulation of channel segregation is available dueto coincidence of calculating final concentration with the test values.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第5期B336-B342,共7页
Acta Metallurgica Sinica
关键词
AL-CU合金
沟
槽偏析
模拟
channel segregation
numerical simulation
back-flow
mushy zone
